Summary
Core Ideas We aimed to advance our mechanistic understanding of desert soil hydrodynamics. We calibrated and validated a HYDRUS‐1D software version on desert soil data from a weighing lysimeter. HYDRUS‐1D is an attractive tool for virtual experiments relevant for arid ecosystems. Although desert soils cover approximately one third of the Earth's land surface, surprisingly little is known about their physical properties and how those properties affect the ecology and hydrology of arid environments. The main goal of this study was to advance our understanding of desert soil hydrodynamics. For this purpose, we developed a process‐based component within HYDRUS‐1D to describe the moisture dynamics of an arid zone soil as a function of water fluxes through the soil surface. A modified van Genuch
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